/Engine/Plugins/Developer/Concert/ConcertMain/Source/ConcertTransport/Public/IdentifierTable/ConcertIdentifierTable.h
Unmap the given name from its identifier index (or NAME_None).
true if the name was unmapped, false if the name wasn't mapped (OutName will be set to NAME_None).
bool UnmapName ( const int32 InIndex, [FName](API\Runtime\Core\UObject\FName) & OutName ) const